20103823 has 4 divisors (see below), whose sum is σ = 20167560. Its totient is φ = 20040088.

The previous prime is 20103821. The next prime is 20103859. The reversal of 20103823 is 32830102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20103823 - 2¹ = 20103821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20103823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31393 + ... + 32026.

It is an arithmetic number, because the mean of its divisors is an integer number (5041890).

Almost surely, 2^20103823 is an apocalyptic number.

20103823 is a deficient number, since it is larger than the sum of its proper divisors (63737).

20103823 is an equidigital number, since it uses as much as digits as its factorization.

20103823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63736.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20103823 is about 4483.7286938440. The cubic root of 20103823 is about 271.9106495376.

Adding to 20103823 its reverse (32830102), we get a palindrome (52933925).

The spelling of 20103823 in words is "twenty million, one hundred three thousand, eight hundred twenty-three".